If the ip addy had come back to Starbucks, would they have still have punched the door?
If the cops are going to base a warrant of an IP addy, I think it is basic due diligence to see if it is a router on an public network. But then again, maybe I'm expecting too much?
Just because it shows up unlocked on the list, does not mean it is unsecure, you would need to actually connect to it to make sure it is actually unsecure....which w/o a warrant would be a 4th ammendment violation.